Flood-lighting unit



' 1.614122 Jan' n 1927 c. A. B. HALvoRsoN, JR

FLOOD LIGHTING UNIT Filed Sept. 1. 1925 "l-'Iri-wentof: Gromwe'l AB HolvorfsomJn,

HIS Attorney.

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:i receive and hold water so It() by Patented Jan. il, i927.

S'TES PATENT CROMWELL A. E. EIALVORGN, 5R., OF LYNN, IvASSJCI-IUSETTS, ASSIGNOR TO GENERAL ELECTRIC GOMANY,

A CORRATION OF NEW YORK.

FLOOD-LIGHTING UNIT.

Application filed September 1, 1925.

My invention relates tov a flood lighting device. More in particular it relates to a` device of this character which is especially adapted for use in the illumination of a fountain.

Ordinarily the glass door of a flood lighting device becomes quite hot when the light is turned on, and if in this condition it is exposed to falling water, as from a fountain, it will crack. riLhis is particularly true in the case of colored glass. If a flood lighting unit is placed in the center of a fountain, it sometimes occurs that the light source is turned on before the water, with the result that the glass becomes heated before the water begins to fall and, consequently, the glass is broken as the water strikes it.

It is one of the objects of my invention to provide a flood lighting device of special construction which may be free, from this objection. It is an object to provide in connection with a flood lighting device of the kind described, instead of the usual flat or concave glass, a convex glass arranged to that if the light is turned on before the foiintain the glass will not become overheated.

The invention will be more fully vunderstood from the following specification am reference to the accompanying drawing, in which Fig. l shows the flood lighting device` of my invention in perspective; 2 shows the upper part of the device iu section, the hood and the concave glasses and their supports being clearly indicated.

Referring more in particular to the drawing, it will be seen that the flood lighting device is supported upon a base consisting of a ring 2, an arc 2, and a frame 3. The ring 2 may be secured to any suitable foundation in any way desired. The are 2 is arranged so that it may rotate about a vertical axis while the frame 3 is arranged so that it may rotate by the horizontal axis through bearings, suoli as the bearing 9. The frame 3 supports the usual reflector 4 within the focal region of which there is located a snitable source of light, such ras an electric lamp, the conductors for supplying currentV to which reach the lamp by way of the device 5. The-frame of the device is provided with a door, which latter is provided in turn with a hinge 7 so that the upper portion of the flood lighter may be opened and closed when access to the interior is desired. The door Serial No. 53,904.

may be locked in'position by means of any suitable clamp, such as the clamp 8. Projecting upward from the .door there is a hood l serving as a spacer on the upper side of which the glasses are mounted. Thic hood, which may be in the form of a. spinning, is provided with a Harige 17.` Resting directly upon the top of the spinning there is a concave glass ll which is preferably formed of clear heat resisting glass. This glass, as shown in Fig. 2, is concave, and its rim rests upon a suitable gasket on the flange of the spinning to which the glass is clamped by means of cleats lei. Around the flange 17 I provide a series of upright elements 13 which support a ring 16. Within this ring a second concave glass l2 rests just above the glass l1. This upper glass can be in the form of a colored glass for the purpose of producing a colored flood. lighting beam. This glass is clamped in position by means of cleats l5. YThe ring 16 is provided with one or more openings on the inside between the rim of the glass 12 and the outer rim of the ring through which water maypass and drop down into the concave glass ll.

Vith the arrangement described the falling water from the fountain will first fill the upper glass 12 which will soon overflow and in overflowing allows the concave glass l1 also to become filled with water. As long as the glasses 11 and l2 are filled with water the source of light may be allowed to run without much danger' of either glass being broken. If, by chance, the fountain should be cut off and the source of light allowed to continue burning, the water held by the glasses l1 and 12 will serve to keep the glasses for a considerable length of time without dang-er of the glasses being broken. The object in having the lower concave glass is that it may serve as a protecting element for the upper colored glass, which is much more sensitive to heat.

Vihile I have illustrated my invention in connection with a specific form of device, it will be understood that in View of the disclosure variations may be readily carried out without departing from the spirit of the invention or from the scope of the claims herein.

What I claim as new and desire to secure by Letters Patent of the United States is l. In combination with a double basin for holding' Water, a light projector, said projector located beneath the basin whereby a beam oic light may be projected through both sections ot' the basin, said sections being transparent to lieht, one being clear and the other being colored, both serving to hold water for keeping` them cool the clear one serving with its Water as a heat shield tor the lfecond and the second serving to render the beam colored.

2. In combination with a double Water basin ot transparent 1naterial,a floodlighting device, the latter located beneath the basin whereby a beam of light may be prejected Jfrom the unit through both basins, one of said basins being colored.

3. A light projector having a reflector and a light source located at the local region of the reflector, a concave glass cover ior said reflector, the axis of said cover coinciding with the axis or' Said reflector, and a second concave glass nested over the first glass and having an axis common with the axis of the first glass and spaced with respect to the first glass both glasses serving to hold Water.

il. A light projector having a reflector and a light source located at the focal region of the reector, a concave glass cover for said reflector, the axis of said cover coinciding with the axis of said reflector:y and a second concave glass nested over the iirst glassy and having an axis common with the axis of the first glass and spaced with respect to the lirst glass, said irst glass serving to shield the second glass from the heat ot the light source, and means tor maintaining ,said coinnion axis in a vertical posit-ion, said glasses serving as basins to hold water to keep them cool.

5. A fountain light comprising a light source :tor producingl a beam, a glass basin ot light transmitting material located over the light through which basin the beam is transmitted, said basin serving to hold Water to keep it from cracking and a light transmitting colored element over the basin and in the path of the beam ifor coloring the latter.

In Witnc's whereof, I have hereunto set in); hand this 29th day ot' August, 1925.

CROMWELL A. B. HALVORSON, Jr. 

